Παραπομπή APA

(1962). Public expenditures for outdoor recreation. Washington, D.C: Outdoor Recreation for America.

Παραπομπή Chicago Style

Public Expenditures for Outdoor Recreation. Washington, D.C: Outdoor Recreation for America, 1962.

Παραπομπή MLA

Public Expenditures for Outdoor Recreation. Washington, D.C: Outdoor Recreation for America, 1962.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.